Syrocki, B. John  1912- <br/><br/>
What is a machine / 
by B. John Syrocki ; illustrated by Gregory Onlaff 
 - London :  Collins,  1960 
 - 48 p. :  ill. ;  21 cm. 
 - The what is it series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machinery--Juvenile literature<br/>Technology--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>621